ZyXEL Communications P-2602 manual Examples of Services, Appendix F Services 371

P-2602H(W)(L)-DxA Series User’s Guide

AP P E N D I X F

Services

The following table lists some commonly-used services and their associated protocols and port numbers.

•Name: This is a short, descriptive name for the service. You can use this one or create a different one, if you like.

•Protocol: This is the type of IP protocol used by the service. If this is TCP/UDP, then the service uses the same port number with TCP and UDP. If this is USER-DEFINED, the Port(s) is the IP protocol number, not the port number.

•Port(s): This value depends on the Protocol.

•If the Protocol is TCP, UDP, or TCP/UDP, this is the IP port number.

•If the Protocol is USER, this is the IP protocol number.

•Description: This is a brief explanation of the applications that use this service or the situations in which this service is used.

Table 150 Examples of Services

NAME	PROTOCOL	PORT(S)	DESCRIPTION
AH	User-Defined	51	The IPSEC AH (Authentication Header)
(IPSEC_TUNNEL)			tunneling protocol uses this service.
AIM	TCP	5190	AOL’s Internet Messenger service.
AUTH	TCP	113	Authentication protocol used by some
			servers.
BGP	TCP	179	Border Gateway Protocol.
BOOTP_CLIENT	UDP	68	DHCP Client.
BOOTP_SERVER	UDP	67	DHCP Server.
CU-SEEME	TCP/UDP	7648	A popular videoconferencing solution from
	TCP/UDP	24032	White Pines Software.
DNS	TCP/UDP	53	Domain Name Server, a service that
			matches web names (e.g. www.zyxel.com)
			to IP numbers.
ESP	User-Defined	50	The IPSEC ESP (Encapsulation Security
(IPSEC_TUNNEL)			Protocol) tunneling protocol uses this
			service.
FINGER	TCP	79	Finger is a UNIX or Internet related
			command that can be used to find out if a
			user is logged on.
FTP	TCP	20	File Transfer Program, a program to enable
	TCP	21	fast transfer of files, including large files that
			may not be possible by e-mail.
H.323	TCP	1720	NetMeeting uses this protocol.

Appendix F Services 371